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OMERACT consensus-based operational definition of contextual factors in rheumatology clinical trials: A mixed methods
Sabrina Mai Nielsen1, Maarten Boers2, Maarten de Wit3
1Section for Biostatistics and Evidence-Based Research, The Parker Institute, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark; Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense University Hospital, Odense, Denmark.
Objectives:
To develop an operational definition of contextual factors (CF) [1].
Methods:
Based on previously conducted interviews, we presented three CF types in a Delphi survey; Effect Modifying -, Outcome Influencing - and Measurement Affecting CFs. Subsequently, a virtual Special Interest Group (SIG) session was held for in depth discussion of Effect Modifying CFs.
Results:
Of 161 Delphi participants, 129 (80%) completed both rounds. After two rounds, we reached consensus (≥70% agreeing) for all but two statements. The 45 SIG participants were broadly supportive.
Conclusion:
Through consensus we developed an operational definition of CFs, which was well received by OMERACT members.
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